If your pediatrician or teachers say "wait and see" or "he'll catch up," but you still have concerns, get a second opinion.
If your 1st grader is behind in reading, there is a reason. Look for the underlying cause. Ask why? It's not good enough to label a 'reading disorder' - we need to address the underlying weakness.
Expect progress within a few months in any treatment program - not a 'cure' - but measurable improvement. If not, seek a second opinion.
Before addressing "attention" issues, rule-out language processing problems. It's hard to attend, especially in a busy class, if one doesn't understand or can't keep up with the language demands.